The interpretation timeline
Psalm 78:5 Douay-Rheims

How long, O Lord, wilt thou be angry for ever: shall thy zeal be kindled like a fire?

A.D. 389 – 1875 6 witnesses

Patristic

before A.D. 750
389
A.D.
A.D. 329–390
“Some things mentioned in the Bible are not factual; some factual things are not mentioned; some nonfactual things receive no mention there; some things are both factual and mentioned. Do you ask for my proofs here? I am ready to offer them. In the Bible, God "sleeps," "wakes up," "is angered," "walks" and has a "throne of cherubim." Yet when has God ever been subject to emotion? When do you ever hear that God is a bodily being? This is a nonfactual, mental picture. We have used names derived from human experience and applied them so far as we could, to aspects of God. His retirement from us, for reason known to himself into an almost unconcerned inactivity, is his "sleeping." Human sleeping, after all, has the character of restful inaction. When he alters and suddenly benefits us, that is his "waking up." Waking up puts an end to sleep, just as looking at somebody puts an end to turning away from him. We have made his punishing us, his "being angered"; for with us, punishment is born of anger. His acting in different places, we call "walking," for walking is a transition from one place to another. His resting among the heavenly powers, making them almost his haunt, we call his "sitting" and "being enthroned"; this too is human language. The divine, in fact, rests nowhere as he rests in the saints. God's swift motion we call "flight;" his watching over us is his "face";12 his giving and receiving is his "hand." In short every faculty or activity of God has given us a corresponding picture in terms of some thing bodily.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“In the second place now giving utterance to an evident prayer, whence it may be perceived that the calling to remembrance of former affliction is not by way of information but prayer; "How long," he says, "O Lord, will You be angry, unto the end? Shall Your jealousy burn like fire?" [Psalm 79:5]. He is evidently asking God not to be angry unto the end, that is, that this so great oppression and tribulation and devastation may not continue even unto the end; but that He moderate His chastening, according to that which is said in another Psalm, "You shall feed us with the bread of tears, and You shall give us to drink of tears in measure." For the, "how long, O Lord, will You be angry, unto the end?" has been spoken in the same sense as if it had been said, Be not, O Lord, angry unto the end. And in that which follows, "shall Your jealousy burn like fire?" both words must be understood, both, "how long," and, "unto the end:" just as if there had been said, how long shall there burn like fire Your jealousy unto the end? For these two words must be understood in the same manner as that word which was used a little higher up, namely, "they have made." For while the former sentence has, "they have made the dead bodies of Your servants morsels for the fowls of heaven:" this word the latter sentence has not, wherein is said, "the fleshes of Your saints for the beasts of the earth;" but there is surely understood what the former has, namely, "they have made." Moreover, the anger and jealousy of God are not emotions of God; as some do charge upon the Scriptures which they do not understand: but under the name of anger is to be understood the avenging of iniquity; under the name of jealousy, the exaction of chastity; that the soul may not despise the law of her Lord, and perish by departing in fornication from the Lord. These then in their actual operation in men's affliction are violent; but in the disposal of God they are calm, unto whom has been said, "But You, O Lord of virtues, with calmness dost judge." [Wisdom 12:18] But it is clearly enough shown by these words, that for sins these tribulations do befall men, though they be faithful: although hence may bloom the Martyrs' glory by occasion of their patience, and the yoke of discipline godly endured as the scourge of the Lord. Of this the Maccabees amid sharp tortures, of this the three men amid flames innocuous, [Daniel 3:21] of this the holy Prophets in captivity, do testify. For although paternal correction most bravely and most godly they endure, yet they do not hide the fact, that these things have befallen them for the deservings of their sins.. ..”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“How long Heb. עד מה [lit. until what.] Until when? Your jealousy Your wrath, that You are jealous to wreak vengeance, an expression of (Exod. 20:5): “a jealous (קנא) God,” emportement or enprenemant in Old French, zealous anger.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“How long, Lord, wilt thou be angry? for ever?.... That is, how long wilt thou be angry? shall it be for ever? see Psa 85:4, for though what was done, or to be done, as before related, was or will be done by the enemies of the Lord's people, yet by his permission, and as a token of his anger and displeasure against them: at least it might be so understood, both by them and by their enemies; and hence this expostulation, shall thy jealousy burn like fire? so jealousy does; its coals are coals of fire, Sol 8:6, there were, at the times referred to, such among the people, who did evil things, and provoked the Lord to jealousy and wrath: see the Apocrypha: "And there was very great wrath upon Israel.'' (1 Maccabees 1:64) "When this was done, and they had made a common supplication, they besought the merciful Lord to be reconciled with his servants for ever.'' (2 Maccabees 8:29)”
Source
1863
A.D.
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“Out of the plaintive question how long? and whether endlessly God would be angry and cause His jealousy to continue to burn like a fire (Deu 32:22), grows up the prayer (Psa 79:6) that He would turn His anger against the heathen who are estranged from the hostile towards Him, and of whom He is now making use as a rod of anger against His people. The taking over of Psa 79:6-7 from Jer 10:25 is not betrayed by the looseness of the connection of thought; but in themselves these four lines sound much more original in Jeremiah, and the style is exactly that of this prophet, cf. Jer 6:11; Jer 2:3, and frequently, Psa 49:20. The אל, instead of על, which follows שׁפך is incorrect; the singular אכל gathers all up as in one mass, as in Isa 5:26; Isa 17:13. The fact that such power over Israel is given to the heathen world has its ground in the sins of Israel. From Psa 79:8 it may be inferred that the apostasy which raged earlier is now checked. ראשׁנים is not an adjective (Job 31:28; Isa 59:2), which would have been expressed by עונותינו חראשׁנים, but a genitive: the iniquities of the forefathers (Lev 26:14, cf. Psa 39:1-13). On Psa 79:8 of Jdg 6:6. As is evident from Psa 79:9, the poet does not mean that the present generation, itself guiltless, has to expiate the guilt of the fathers (on the contrary, Deu 24:16; Kg2 14:6; Eze 18:20); he prays as one of those who have turned away from the sins of the fathers, and who can now no longer consider themselves as placed under wrath, but under sin-pardoning and redeeming grace.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.